Coil wrapping machine



E. W. COLLINS COIL WRAPPING MACHINE 4 sheets sheet 1 Filed Oct. 19, 1931INVENTOR.

A TTORNEY.

Nov. 27, 1934.

Nov. 27, 1934. w, co s 1,981,946

COIL WRAPPING MACHINE Filed Oct. 19, 1931 4 Sheets-Sheet 2 INVEN TOR.

A TTORNE Y.

4 Sheets-Sheet 3 E. W. COLLINS COIL WRAPPING MACHINE Filed Oct. 19, 1931INVENTOR! BY gar/14 ml;

ATTOkNEY.

am an Nov. 27, 1934.

1934- E. w. COLLINS COIL WRAPPING MACHINE Filed Oct. 19, 1951 4Sheets-Sheet 4 INVENTOR.

A TTORNEY.

i atented Nov. 27, 1934 UNETEE STATES COIL WRAPPING MACHINE Edward W.Collins, Detroit, Mich., assignor, by

mesne assignments, to General Motors Corporation, Detroit, Mich,

ware

a corporation of Dela- Application October 19, 1931, Serial No. 569,679

14 Claims.

This invention relates to the manufacture of coils and more particularlyto the wrapping of short strips of paper around the active sides of formwound coils.

It is an object of the present invention to provide a coil wrappingmachine which is simple in construction, reliable in operation, andeconomicai of manufacture, and which is an improvement upon the wrappingmachine disclosed in the patent to Jasper F. Cullin No. 1,380,531, June7, 1921.

It is a further object of the present invention to provide a powerdriven, manually controlled machine having novel details ofconstruction, especially in the paper feeding and locking mechanism.

Still further objects and advantages will readily occur to those skilledin the art upon reference to the following description and theaccompanying drawings in which Fig. 1 is a side elevation of theimproved machine,

Fig. 2 is a plan view of the machine.

Fig. 3 is a longitudinal sectional view of the r machine taken on theline 3--3 of Fig. 2.

Fig. 4 shows an end portion of Fig. 3, however, certain parts beingshown in a different position.

Fig. 5 is a section taken on the'line 5-5 of Fig. 4.

Fig. 6 is an enlarged view of the clutch of the machine, looking in thedirection of arrow 6 in Fig. 2.

Figs. 7, 8 and 9 are sectional views taken on the lines 7-'7, 88 and 99,respectively, of Fig. 6.

Fig. 10 is a perspective view of a detail of the paper feeding andlocking mechanism.

Fig. 11 shows a coil the active sides of which are wrapped with paper.

Fig. 12 is a section taken on the line 12-12 of Fig. 11.

The prior art machine and the present machine are similar, bothincluding a horizontally slidable carriage above which passes gummedpaper to be moistened and wrapped around one active side of a coil C,which side is of rectangular crosssection. This active coil side isdeposited in the machine by the operator who urges said coil sideagainst the strip of gummed paper near the end of the latter and into atransverse groove in the carriage. The carriage advances from a coilreceiving position in order to fold the end of the paper over a portionof said coil side, then retracts beyond the coil receiving position inorder to sever a sheet of paper from the strip and to fold this severedpaper strip over the remainingportion of the coil side, and thenadvances into coil receiving position in order to free the wrapped coilside for removal and to receive another coil side to be wrapped.

In the prior art machine, the carriage was moved manually, whereas thepresent machine provides power means for moving the carriage.

The present machine furthermore provides means for locking the paperpositively against movement during carriage retraction, whereas theprior art machine provided no such means.

The present machine is furthermore provided with a construction of thepaper feeding means.

It will be seen, therefore, that the principal features of the presentmachine reside in the power drive of the carriage, the construction ofthe paper feeding means, and the construction of the paper lockingmeans.

The present machine includes a suitably supported bed upon which aredisposed the various operating parts of the machine. Mounted upon thebed is a machine base 22 upon which slides a carriage 24 which isconnected by means of links 26 whose ends are kept properly spaced by atie rod 27 and a longitudinally adjustable connecting rod 28, to a crankdisc 30 on a cam shaft 32. Rotation of the shaft therefore causesadvancing and retracting movements of the head 24.

The drive Loosely mounted on the cam shaft 32 is a continuously rotatingchain driven sprocket wheel having equi-angularly spaced projecting pins42 which are adapted to engage a pin 44, longitudinally slidably carriedby a shaft collar 46 and keyed to shaft 32, thereby to rotate the latterand the cam shaft (see Fig. 6). Driving pin 44 is moved into the path ofmovement of pins 42 by a cam disc 48, having a cam surface 56 and beingloosely mounted on cam shaft 32. Cam disc 48 is provided with an arm 50(see Figs. 1 and 2), pivotally connected to an operating link 52 whichpasses thru the bed 20 and which is connected to a foot pedal 54.Actuation of the foot pedal by the operator causes pin 44 to be thrustinto the path of movement of the pins 42 on the sprocket wheel 40 as canbe readily understood.

Pivotally mounted spring urged links 58 and 60 (see Figs. 7 and 8) lookcam disc 48 and collar 46, respectively, acting therefore as positivestop locks for the shaft 32 by intermediation of collar 46. It istherefore obvious that upon actuation of the foot pedal 54 by theoperator shaft 32 will make one complete revolution and no more, thelocking links 58 and 60 positively locking cam disc 48 and collar 46,respectively, at the completion of one revolution.

The carriage Unreeled from a spool 69 and passed over a stationary plate70 above the base and the carriage 24 is a strip of gummed paper 71having its gummed surface moistened by a moistening felt pad 72,suitably mounted and resiliently urged towards the gummed surface of thepaper (see Fig. 3). One end of the felt pad is immersed in watercontained in a suitable container which is supported in any suitablemanner by a bracket mounted on the bed 20.

When the operation of coil side wrapping is to commence, the carriage 24is in coil receiving position in which its transverse groove or slot "/3which is in alignment with transverse slots in the bars 26 assumes theposition shown in Fig. 1. The paper at this time has its free andmoistened end disposed slightly beyond the slot 73 as best shown in Fig.l. The operator urges a coil side against the paper and into thetransverse groove '73, and then actuates the foot pedal. Shaft 32commences to rotate and advances carriage 24 toward the adjacent end ofthe machine, whereby the end of the paper is folded over the coil sideand disposed between said coil side and a stationary plate '75. At thistime a high spot 76 on crank disc 3-0 engages a bar '77, which ispivotally mounted on base 22 as at 78, and tilts said barcounterclockwiseas viewed in Fig. 3, thereby causing a screw pin 79carried by bar '77 to press against an aligned pin "79a, longitudinallymovable in carriage 24 and a cross bar '80, guided for movement parallelto the direction of movement of pin 79a in a slot 73 of the carriage,such pressure of the cross bar 80 tending to press the paper firmlyagainst the coil side to insure proper binding of the gummed paper tothe coil side.

The cairiageis'then retracted into the position shown in Fig. 4, wherebythe coil side in the carriage groove 73, together witha portion of thepaper is moved underneath a sheet metal blade 81, secured in anysuitable manner to stationary plate '70. As the paper crosses over theserrated edge '82 of this sheet metal blade during such retractingmovement of the carriage, a sheet of paper, part of which is alreadywrapped around part of the coil side, is torn loose from the paperresting 'onpl'at'e "70. Continued retracting of the carriage causestheto-r'n sheet of paper to be folded 'abovethe first flap, which hadbeen folded down during theearlier described advance stroke.

At this time, another high spot 83 on crank disc 30 causes bar 77 totilt counterclockwise as viewed in Fig. 3, inorder 'to 'cause a screwpin 84, carried by bar '77 to vpress against pin 79a and cross bar 80 inorder to press the last flap of paper firmly against the coil side. H

Continued rotation of shaft 32 then advances the carriage into "coilreceiving position where the wrapped coil may be removed from betweenthe stationary plates '70 and 75.

In order to clamp-thecoil side into the carriage groove "73,bef0re it ismoved under the stationary plates and 70, -a clamping yoke 90, pivotallymountedat 91 on theearriage links 26 and normally urged intoth'e'pos'itio'n shown in Fig. 1 by a tension spring '92, may be turnedclockwise as viewed in Fig. 1 by the "operator as he places a coil sideintothe carriage groove '73,

Paper feeding and locking means An important feature of the presentmachine is the improved means for feeding the paper forwardly while thecarriage is being advanced from the position shown in Fig. 4 to the coilreceiving position shown inFig. 1. Such means, disclosed best in Figs.1, 3 and 10, include a plate 100 (Fig. 3), which is carried by thecarriage. The paper passes between said plate 100 and stationary spacedplate 100a. A leaf spring 101 normally urges the paper against plate100, said leaf spring being attached to a collar 102, mounted on a crossbar 103 which is journalled in leg portions 104 of the carriage links26.

Pivotally mounted on one of said carriage links 26 as at 106 is alocking plate 107, connected by a tension spring 108 to a bell cranklever 105. When the carriage assumes the position shown in Fig. 4, bellcrank lever 105 is rocked into the position shown in Fig. 1 by astationary pin 109, which is secured to a pedestal 110 mounted on base20, and is locked in that position by the engagement of a shoulder ofsaid bell crank lever with a shoulder of locking plate 107 and held insuch locking relationship by spring 108. Consequently when bell cranklever 105 is thus locked, considerable pressure is exerted by leafspring 101 against the paper, which is thereby firmly clamped againstplate 100.

As the carriage advances toward coil receiving position, the lockingplate 107 is engaged by a stationary cam plate 112 attached to themachine base 22 and is rocked clockwise as viewed in Fig. 1. Suchrocking motion of the locking plate causes separation of bell cranklever 105 from the locking plateand hence relief of pressure exerted byspring leaf 101 against the paper which is then free to slide along theplates 100 and 70. and so arranged that when the carriage has reachedcoil receiving position, locking plate 107 has been rotated aconsiderable amount, enough to permit spring 108 to draw bell crank 105and leaf spring 101 entirely out of engagement with the paper.

When the carriage advances from coil receiv ing position into that shownin Fig. 3, the paper does not move with the carriage but is heldstationary by locking means to be described, so that the foremost end ofthe paper may be tucked under the plate 7 5 and folded around the coil,as previously described.

When the carriage is retracted from the position shown in Fig. 3, thepaper is still stationary due to the fact that the leaf spring v1101 isno longer in contact with the paper, the leaf spring being locked out ofcontact with the paper by the engagement of another shoulder of Camplate 107 is of such shape the locking plate 10'. with the shoulder :ofthe 1'.

bell crank lever 105. The carriage is therefore retracted from theposition shown in Fig. 3"without affecting the position of the paper,with the exception of the cut off part which is being tucked under thestationary plate 70to be folded pad holder, which is provided with acrank 122 and a cam bar 123 above the paper strip. The crank is adaptedto be engaged by one or the other of two lugs 124 projecting from one ofthe carriage links 26 and thereby shifted either into paper clamping orpaper released position. It is obvious that neither of the lugs passesbeyond the crank, but that they merely shift the cam bar from oneextreme position into another extreme position.

While the form of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood thatother forms might be adopted, all coming within the scope of the claimswhich follow.

What is claimed is as follows:

1. In a wrapping machine, a movable wrapping carriage having a groovefor eceiving an article and a portion of a wrapper partly wound aroundthe article; two stationary spaced plates adapted to cooperate with thearticle in the moving carriage groove to fold the loose ends of thewrapper onto the article; a drive shaft; a crank on the shaft forreciprocating the carriage; a pivotally mounted bar for forcing thearticle and a folded wrapper end against a plate at the end of eachstroke of the carriage; and means on the shaft for causing rotarymovements of the bar.

2. In a wrapping machine, a movable wrapping carriage having a groovefor receiving an article and a portion of a wrapper partly wound aroundan article; two stationary spaced plates adapted to cooperate with thearticle in the moving carriage groove to fold the loose ends of thewrapper onto thearticle; a drive shaft; a pivotally mounted bar forforcing the article and a folded wrapper end against a plate at the endof each stroke of the carriage; and a member on said shaft forreciprocating the carriage and for causing rotary movements of the bar.

3. In a wrapping machine, a movable wrapping carriage having a groovefor receiving an article and a portion of a Wrapper partly wound aroundthe article; two stationary spaced plates adapted to cooperate with thearticle in the moving carriage groove to fold the loose ends of thewrapper onto the article; a drive shaft; a crank on the shaft having acam shaped periphery; a linkage connecting the crank with the carriage;and a pivotally mounted bar cooperating with the cam shaped periphery ofthe crank adapted to be turned thereby in order to force the article anda folded wrapper end against a plate at the end of each stroke of thecarriage.

4. In a wrapping machine, the combination of a reciprocable carriagehaving a groove for receiving an article and a portion of a wrapperpartly wound around the article; two stationary spaced plates adapted tocooperate with the article in the carriage groove to fold the loose endsof the wrapper onto the article; a drive shaft; a crank on the shaft forreciprocating the carriage; a pivotally mounted bar for forcing thearticle and a folded wrapper end against a plate; cams on the shaft forcausing rotary movements of the bar; a driving wheel; manually operablemeans for clutching the shaft to the Wheel; and means for automaticallyreleasing the shaft from the wheel at the end of each revolution of theshaft, said shaft during each revolution causing the carriage to advancepartially, retract fully, and again advance partially, and also causingone end of the bar to be raised and lowered twice.

5. In a wrapping machine, the combination of means including areciprocable carriage for Wrapping a strip of flexible material aroundan article; a plate movable with the carriage for supporting a supply ofwrapping material; a device for clamping the wrapping material to theplate; and means responsive to movement of the carriage through apreassigned cycle for actuating said device.

6. In a wrapping machine, the combination of means including areciprocable carriage for wrapping a strip of flexible material aroundan article; a plate movable with the carriage for supporting a supply ofwrapping material; means also movable with the carriage to clamp thewrapping material to the plate; stationary means causing the clampingmeans to become effective at the end of a predetermined cycle ofmovement of the carriage; and a second stationary means causing theclamping means to become ineffective at the end of another predeterminedcycle of movement of the carriage.

'7. In a wrapping machine, the combination of means including areciprocable carriage for wrapping a strip of flexible material aroundan article; a plate movable with the carriage for supporting a supply ofwrapping material; means also movable with the carriage to clamp thewrapping material to the plate; stationary means causing the clampingmeans to become effective at the end of a predetermined cycle ofmovement of the carriage and to remain effective; and a secondstationary means causing the clamping means to become ineffective at theend of another predetermined cycle of movement of the carriage and toremain ineffective.

8. In a wrapping machine, the combination of means including areciprocable carriage for wrapping a strip of flexible material aroundan article; a stationary plate for supporting a supply of wrappingmaterial; means movable with the carriage to feed the wrapping materialover the plate during a certain cycle of movement of the carriage; andmeans responsive to a predetermined cycle of movement of the carriageother than said certain cycle for clamping the wrapping material to theplate.

9. In a wrapping machine, the combination of means including areciprocable carriage for wrapping a strip of flexible material aroundan article; a stationary plate for supporting a supply of wrappingmaterial; means movable with the carriage to feed wrapping material overthe plate during a predetermined cycle of movement of the carriage;means for relieving the wrapping material of the feeding means duringanother cycle of movement of the carriage; and means to clamp thematerial to the plate during a part of said other cycle of movement ofthe carriage.

10. In a wrapping machine, the combination of means including areciprocable carriage for wrapping a strip of flexible material aroundan article; a stationary plate for supporting a supply of wrappingmaterial; means movable with the carriage to feed the wrapping materialover the plate during a certain cycle of movement of the carriage; meansresponsive to said completed cycle of movement of the carriage forrelieving the wrapping material of the feeding means; and means to clampthe material to the plate during another predetermined cycle of movementof the carriage.

11. In a wrapping machine, the combination wrapping a strip of flexiblematerial around an article; a stationary plate for supporting a supplyof wrapping material; means movable with the carriage to feed thewrapping material over the plate during a certain cycle of movement ofthe carriage; means actuated in response to. said completed cycle ofmovement of the carriage for relieving the Wrapping material of thefeeding means; and means actuated in response to another cycle ofmovement of the carriage for clamping the wrapping material to, theplate.

12. In a wrapping machine, the combination of means including areciprocable carriage for Wrapping a strip of flexible material aroundan article; a stationary plate for supporting a supply of wrappingmaterial; means movable with.

the carriage to feed the wrapping material over the plate during acertain cycle of movement of the carriage; and means responsive to apredetermined cycle of movement of the carriage other than said certaincycle for clamping the wrap ping material to the plate, and responsiveto said completed predetermined cycle of movement of the carriage forreleasing the wrapping material from the plate.

13. In a Wrapping machine, the combination 'of means including areciprocable carriage for Wrapping a strip of flexible material aroundan article; a stationary plate for supporting a supply of Wrappingmaterial; means movable with I the carriage to feed the wrappingmaterial over the plate during a certain cycle of movement of thecarriage; means actuated in response to said completed. cycle ofmovement of the carriage for relieving the wrapping material of thefeeding means; and means responsive to a predetermined cycle of movementof the carriage other than said certain cycle for clamping the wrappingmaterial to. the plate, and responsive to said completed predeterminedcycle of movement of the carriage for relieving the wrapping material ofthe clamping means.

14. In a Wrapping machine, the combination of means for Wrapping a sheetof flexible mate rial around an article, said means including stationarymembers and a reciprocable member receiving the article; a wrappingmaterial supply reel; a first stationary plate for supporting unreeledWrapping material and guiding the same to the wrapping means; a secondplate carried by one 01 said stationary members and having a serratededge in close proximity to the unreeled wrapping material, said materialbeing moved into engagement with said serrated edge and severed therebyupon movement of the reciprocable member through a predetermined cycle;and a turnable cam bar extending across the first plate and operable toclamp the unreeled material to said first plate in order to preventslipping of the material during the severing thereof.

EDWARD W. COLLINS.

